Chaeles e



(No Model.)

O. E. SORIBNER.

AUTOMATIC SHUNT FOR MAGNETO GENERATORS. No. 383,016. Patented May 15.1888.

wii'nesses UNITED STATES PATENT CEEICE.

CHARLES E. SCRIBNEB, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WESTERNELECTRIC COMPANY, OF SAME PLACE.

AUTOMATIC SHUNT FOR MAGNETO=GENE RATORS.

SPECIFICATION forming part of Letters Patent No. 383,016, dated May 15,1888.

Application filed December 3,1885. Serial No. 184,561. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES E. SORIBNER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Automatic Shunts forMagneto-Generators, (Case 99,) of which the following is a full, clear,concise, and exact description, reference being'had to the accompanyingdrawings, forming a part of this specification. My invention relates todynamo or magneto electric machines, and is designed to automaticallyopen the shuntcircuit around the machine when the armature is in motion,so that the current generated may be sent to line.

As to the state of the art prior to my invention, reference is made toLetters Patent N 0. 309,617, granted Elisha Gray December 23, 1884, fortelephone call-boxes. In said patent means are described and claimed forautomatically holding the shunt open while the armature is in motion,the shunt being automatically closed when the armature comes to rest. Inmy invention herein I accomplish the same result by means of an extracoil of coarse wire about the armature connected in the circuit of anelectromagnet, which when energized serves to hold the shuntcircuitaround the machine open.

In the accompanying drawings, Figure 1 is a view of a magneto-generatorprovided with my automatic shunting device. Fig. 2 is a diagramillustrative of the circuits.

The armature a, in addition to the usual 5 coils, b, is provided withthe extra or additional coil 0. This coil 0 is placed in the circuit ofthe coils of electro magnet d. The armature-lever e of saidelectro-magnet is normally included in the circuit of the shunt-wire f.When the electro-magnet is energized, le-

ver 6 will be brought against stop 9, thus opening the shunt-wiref. Theshunt-wiref being thus opened, current will be sent to line to ring thebelli or to do any other work required.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination, with a dynamo or magneto electricmachine, ofa shunt-circuit around the machine, an extra coil upon thearmature, an electro-magnet included in the circuit of said extra coil,and the armature-lever of said electro-magnet included in theshunt-circuit, whereby the shuntcircuit is held open and current sent toline when the machine is in operation.

2. In a dynamo or magneto electric machine, the revolving armatureprovided with two coils wound thereon, one ofsaid coils being includedin the main circuit and the other coil includiug an electromagnet, and ashunt-wire around 60 the machine including the armature of saidelectro-magnet, said shunt-wire being closed when the armature is atrest, but open when the armature is revolved to energize theelectro-magnet, substantially as described.

In witness whereof I hereunto subscribe my name this 28th day ofOctober, A. D. 1885.

CHARLES E. SCRIBNER.

Witnesses:

GEORGE P. BARTON, F. H. MoGULLocH.

